Improvement in the manufacture of breech-plates for qttnj



WALTER BAKER, OF ILl'ON, NEW YORK. Leers Paemlvo. 88,003, (aan nach as, 1869.

MPROVEIEENT IN THE MANUFACTURE 0F 'BREECH-PMTES FOR GNS- The Schedule referred to in these Letters Patent and making part of the name- To all whom it muy concern Beit known that I, WALTER BAKER, of Ilion, Herkimer county, New York, have invented a new and improved Roll-Swaging Machine and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawings',- and to the letters of reference marked thereon.

Similar letters of reference indicate the same devices in all the gures.

To enable others skilled in the arts to comprehend, make, and use my invention, I will proceed to describe its nature, construction, and operation.

The nature of my invention consists in the employment of curved dies, of suitable form and dimensions, fo'r rolling breech-plates, in combination with oscillating rolls.

Figure 1 is a side elevation of my roll-swaging ma.- chine.

Figure 2 is a cross-vertical section of the same, through the centre of the rolls.

' Figure 3 shows the form of the breech-plate at the commencement and termination of the operation of swaging.

Figure 4, dies for swaging breech-plates.

Figure 5, nishing-dies for the same.

a, frame.

b, rolls. Y

c, middle dies.

c', middle-bed dies.

c, outside dies.

d", outside-bed dies.

d, upper bed, and d', lower bed, which support the rolls. d", lower outsidc'bed.

e, gears, one on each end of each roll.

e', racks, in which the gears run.

f, bolts for holding down the upper hed.

f gear-nuts.

g, gear, working in nuts f.

g', lever of gear g.

7i, stud of gear g.

y i, spring between the frame and upperbed.

i', dowels, to prevent lateral motion of the upper bed.

1c, portion of a bar of iron, broken down preparatory to being swaged into a breech-plate.

l, section of a linished breech-plate.

l', elevation of the same. V

m, movable portion of a lifting-box.

In, spring for raising the upper roll.

o, depression in a lower half of a breech-plate die.

o', projection on the upper half of a breech-plate die for forming the hollow side of the breech-plate.

p, ily-wheel.

q, crank.

fr, rods connecting crank q witharms s on the ends nf the lower roll.

My invention relates to that kind of machinery by y which articles of manufacture are swaged into shape between dies, which are carried by oscillatingrolls.

And the object of my invention is to increase the capacity of the machine, by employing dies between the rolls, and the beds upon which they roll, as well as between the `rolls themselves, by which I obtain dies of different character, suited to the different stages of nsh that the workis in during the process of swaging, the outside dies being most suitable for breaking down the bar, as shown at k, fig. 3, the middle die for swaging into shape, while the middle-bed dies are best adapted to finishing. By placing outside dies at each end of the machine, I have dies enough in one machine to swage the most complicated form. Dies may also be placed between the upper roll and upper bed, both in the middle and at each outside, by which arlagemeut the machine would have three times the capacity of any other machine in use.

The doubleoscillating motion of the rolls upon beds, not only furnishes facilities for using a large number of dies of different character, but by rolling upon beds, instead of rolling in bearings, they serve as frictionrolls for themselves, by which means they are run with less friction than rolls that have not the double-oscillating motion. While using the outside dies, the faces of the bed-dies serve as beds for the support of the ends of the rolls, and while using the outside-bed dies, the faces of the outside dies support the roll.

To raise the upper roll, and keep it in contact with the upper bed, I employ a lifting-box, as seen in lig. 6. The part m, which forms a bearing for the upper roll, is forced upward by the spring n.

Fig. 3. l and l' show a United States breech-plate, for rides, as it leaves the swaging-machine. It is afterward bent, at t, to the required angle, the slight prominence at that .point serving to make the angle perfect.

The rough and'nish-des for abreech-plate are shown in figs. 4: and 5.

' The dies of this machine are separated and brought together again by lever g', iu,th'e usual manner.

The beds d' may be made separate from the frame of the machine; and by placing springs under them, of -just sucient strength to balance the weight of both rolls, without being strong enough to depress spring n, in the' lifting-box, the dies, both between and below the rolls, would always be a little'separated.

The arms s may be placed upon either roll; they may also project upward or downward from the roll to which they are attached, as occasion requires.

Having described my invention,

What I desire to have secured to me by Letters Patent of the United States, isy Combining, with the rolls l: l), the series of dies speciiied, for forming breech-plates, all constructed and op-A erating successively upon the blank, in the manner described.

WALTER BAKER. Witnesses:

D. H. MCLEAN, WM. C. ELLIOT. 

